trans-1,2-Dichloroethylene
Hubbard Hill Apartments
1,2-Dichloroethylene, a neurotoxic solvent, exists in two different forms: trans-1,2-dichloroethylene and cis-1,2-dichloroethylene. A mixture of the two forms is used to manufacture other solvents and chemical products.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 5 | 0 | ND |
| 2020 | ND | 3 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 1 | 0 | ND |
| 2023 | ND | 1 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 60 ppb
The EWG Health Guideline of 60 ppb for trans-1,2-dichloroethylene was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against harm to internal organs.
EPA Maximum Contaminant
Level (MCL): 100 ppb
The legal limit for trans-1,2-dichloroethylene, established in 1991, was based on a toxicity study in laboratory animals conducted in the 1980s.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-10-25 | CB82896VOC1 | ND |
| 2018-10-25 | CB82896 | ND |
| 2019-01-09 | CC26666 | ND |
| 2019-03-12 | CC66559 | ND |
| 2019-05-30 | CD24263 | ND |
| 2019-07-23 | CD63646 | ND |
| 2019-12-12 | CE87153 | ND |
| 2020-01-09 | CF10126 | ND |
| 2020-05-11 | CF93021 | ND |
| 2020-08-25 | CG61944 | ND |
| 2021-01-13 | CH46248 | ND |
| 2022-04-19 | CL12397 | ND |
| 2023-05-02 | CN96368 | ND |